Multiple- valvei fluid control



July 29, 1952 R. J. GLINN ErAL MULTIPLE VALVE PLUIU CONTROL APPARATUS '7 Sheets-Sheet l Filed Nov. 13, 1945 .QNQ ..3 Sk l.' M.. .wm vm wN Nm um mes.

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July 29, 1952 R. J, GLINN ETAL 2,605,107

MULTIPLE VALVE FLUID CONTROL APPARATUS Filed Nov. 15. 1945 'r sheets-sheet 2 v Arme/V196.

July 29, 1952 R. J. GLINN ETAL MULTIPLE VALVE FLUID CONTROL APPARATUS Filed NOV. 13,l 1945 7 Sheets-Sheet 5 July 29, 1952 R. J. GLINN ETAL A 2,605,107

MULTIPLE VALVE FLUID CONTROL APPARATUS Filed Nov. 1s, 1945 '1 sheets-sheet 4 Arrow/Fys.

July 29 1952 R. J. GLINN ETAL 2,605,107

MULTIPLE VALVE FLUID CONTROL APPARATUS Filed Nov. 15, 1945 '7 sheets-sheet 5 83 /07 x /03 /OO /o a6 98,05 /f/ ,O2 //8 //7 l /S H2 los l' //5 96 ma /o ,2, 45, /07- l 2 9o July 29, 1952 I R. J. GLINN Erm. 2,605,107

MULTIPLE vALvE FLUID CONTROL APPARATUS Filed Nov. 1s. 1945 7 sheets-sheet e STOP .SW/7CH MZLQq-m.

July 29, 1952 R. J. GLINN ErAL MULTIPLE VALVE FLUID CONTROL APPARATUS 7 sheetsgsneet 7 Filed Nov. 13, 1945 e e) k. J, w f 3 V A Olivi- L Bm 2 9 D llllllllllllllllll Illlllfllllllllllllllllllll Illllllllllll III-IIIIIIII 9 O e M 4 {--lll/JN a M ||||II| LV Il l I l l l l l I l I l l l I l Il 'III m 6 m M. 7

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9 O @L ---ii/wi?- .--1-21-:--:------ 2 5 4 L Patented July 29, 1952 UNITE-n STATES PAT OFFICE;-

23605107@ MULTIPLE? VALVE'FLuiD CONTROL ArPARATUs my .ritmes Ginniand Percy- Giibe'rt Hel-iden; London,- England,V assignor's: to* Diamond l Power Sp'eeialtyfGopotibngya. corporation of- Ohio'l Appi'icationNvemiier 13, 1945;i s'riarN. 628,012' somme4 (ClfzfzvL-zm' invention relates to fi'uid c'ritr'ol'` aparzt-r tus and. panti'eul'arly tov valves an'd th'eiciperaition. I'n a power operated valiz'e in which the' movableA valve element' is oprated by app'aratusl including a threadedspiii'dle' ffirrd'nut; di'ii/e'i Hy ay power. device such, as. an"e1'ectri'c motor, it" is necessary for tkemoving. parti of thepowe'r deviee-to stop in closely dened. positions? correspending to. the positionsl` t'o.' wliish" t'ie" movable valvev elementiis, t'o. bei moved.v If the'p't'rltisnot so.,.stopped, mechanical.' shook 'orlnd jammihgwf the. parts mayvoccur orA the valv'ee'leient'raybe ixmorreetlyv positioned". With the forni" of.,k apl paratus mentioned .thepower device mustn'ot'omy be stanted and,k stopped, .it must. also kiev reversed. In somevinstancesamain. valve: and. a by-p'a'ss va1ve.are. adaptedtogether to controla?uid"` path; the by-pass'valve servingL toadr'ni-vap'or tY Heat upfa.. portion. of. the path before. the mainivalve isfopenedfandinsucl. case notlonliz. Ias the :noi/'1- ing element ofeach vali/e to be correotlyfpositioned;,the-:e1ements.must.also eoperatedin cbr"- recta'sequence:

One object of ilidpresent-Linvention i's tfo` pirovide-for thefpowen operation of Imain and by-p'ass vaivesfinproper sequenceand, i'n suoli manner astoavoid.. danger. ofl'slock or jamming' o'f the moving: elements ofA` the valves and` tfles'sen" or obviate, thedanger of"`incorreet" positioning of thersaid'.elements...l Another objctofthe. m'vntion is thev provision. offsimpl but effective "opleratingA gear for-.l main. anwbyrpass Valves' w'h'ieli facilitates the remotecontroloftvalves: An= other.. object is...to providejan improved construe'- tion omainand kSy-passvalves.'

Tliefpresentlinventioniicldesiidcontioliap# paratus comprising; main'` and" byepa'ss" valves adapted" to bepower operated, control m'eansa'i ranged` 'soV b'e actuated' by.' th'e'pweif" device and adaptedto stop','thepower'devicat tiie-termina tionvv of the opening; movements` of' thefmova'ble elements. of thevalvesand thiclosing'f'movement oithe lr'nova'ble elemento'f the mainvalve'aud lost motion means 'included 'ixr the' driving 'gear foret:v tuatingthe' movabie eiem'entsvoffth'e valves; and adapted't providewitliin'iimits freedom 'of 'mo'vefment of jthe 'movaioh'ev part:ofiarpowexdevieefireli tively;atothemovabipartsofthevalvesfwl'ii the latterare4l iii-their cosedipositions. l

The investi-0n: wur new .se assessed;- vf

Figure-H1B is a' friigmentery-Av pian viwf' ofi die in communication with the outlet chamber I3 through a port I3.

The valve spindles 2 and 5 are arranged respectively to slide through bushings I9 and 2l) and stuffing boxes 2I and 22 carried by the forging I and through bushings 23 and 24 lining openings through a bridge-piece 25 mounted upon the forging I but spaced therefrom by pillars 25 hav-v ing nat portions 26 for receiving a spanner. The valve discs 3 and 6 are biassed to their closed positions by compression springs 21 and 28 respectively acting between the bridge-piece 25 and seats. 29 and 30 mounted on the upper ends of the valve spindles 2 and 5 and maintained in position on the spindles by U-shaped washers 3l and 32 engaged in annular grooves 33 and 34 in the spindles and in annular recesses 35 and 36 in the seats 2S and 39.

By compressing the spring 21 and removing the U-shaped washer 3l, the valve spindle 2 may readily beY released to permit withdrawal thereof Similarly, by compressing the spring 28 and removing the U-shaped washer 32, the valve spindle 5 may readily be released to permit withdrawal thereof. Conveniently the pipe on which the flange I0 is formed is an elbow-piece anged at both ends, and by removing the pipe and ange AIi) access may be had to the interior of the forging I for thepurpose of inspection, of withdrawing the spindles 2 and 5 with their discs 3 and 5, of lappingrthe discstothe fixed valve seats, or offrenewing the fixed valve seats which are screwed into position in the forging. It will be observed that when the valves are closed and fluid under pressure is admitted to the inlet chamber I2 the fluid pressure assists the springs 21 and 28 and serves to increase the contact pressures between the valve discs and the fixed valve seats.

When the fiuid control apparatus is used to control hot steam, overheating of the springs 21 and 28 is avoided, since the bridge-piece 25 is spaced from the forging I by the pillars 25.

The main valve is arranged to be operated by a cam 31 operating through a tappet 38 and lever 39 Aand the by-pass valve is arranged to be operated by a cam 40 operating through a tappet 4I Aand lever 52, the tappets, levers and a shaft 43 carrying the cams being mounted on bracket 44 l,clamped by studs and nuts 5 to the front face ofthe forging I. Keyed and clamped to the front end of the shaft 43 is a spur wheel 45 and the bracket is fitted with bushingsV 41 and 48 within which the shaft is rotatably mounted. The cams 31 and 4B are shaped after the manner of a ho'rse shoe and are readily accessible through the side of the bracket and the cam 31 is formed with an internalprojection 49, which fits a corresponding annular groove in the shaft, and is clamped to the shaft by a screw passing through ka transverse bore in the shaft and screwing into the cam.V The cam 40 fits a part 5I of the shaft of reduced diameter and is similarly clamped in position by a screw 52 passing through a bore in the shaft and screwing into the cam.

, VThe tappet 38 is provided with a roller 53 for engagement with the cam 31 and with a roller 54 which is in engagement with a groove 55 on the underside of the lever 39 and which by engaging the sides of the groove prevents rotation of the tappet. The lever 35 is pivotally mounted between the forks 5.5 of the bracket 44 on a pin 51 and at its rearjend engagesvthe 'valve spindle 2 through an adjusting screw 5B, whilst at its front end the lever is formed with an annular seating 59 adapted to engage a resilient washer B mounted on the top of the tappet guide 6I within which the tappet 38 operates. 'I'he inward movement of the tappet 38 is limited by engagement between an annular shoulder 62 on the tappet with a corresponding internal shoulder on the tappet guide.

The tappet 4I slides in a tappet guide 63 and is provided with a roller 64 for engagement with the cam 40. The tappet includes an outer headed part 65 arranged to engage the forward end of the lever 42 and to screw into an axial threaded bore in the inner part carrying the roller 64, so that the effective length of the tappet is adjustable. A lock nut 61 serves to maintain the parts and 65 in adjusted position and to clamp a Washer 58 against the part 66. By engaging the outer end of the tappet guide 53 the washer 58 limits the inward movement of the tappet. A suitable key-way and key, not shown, are provided for preventing turning of the tappet 4I in the tappet guide 53. The lever 42 is pivoted below the lever 39 between the forks 56 on a pin 69.

It will be seen that by arranging the bil-pass valve and its cam between the main valve and its cam, with the lever 42 below the lever 39, a compact disposition of the leversis obtained.

The forks 5S of the bracket are formed with bosses 56 having threaded bores whereby a cover plate (not shown) may be secured in position over the levers 39 and 42.

The spur wheel 45 and an associated driving pinion are enclosed in a casing including a base part 1B secured to the bracket 44 and a cover part 1I held on the basepart by the bolts 12. The cover part 1I is formed with an annular inward projection 13, between which and the forward face of Van inner portion 14 of the spur wheel is a washer 15 surrounding the hub of the spur wheel. It will lbe seen that the cam shaft 43 is positioned axially, since it is secured to the spur wheel and the latter is located between the bushing 1 and the washer 15.

The pinion cooperating with the spur wheelv 46 is arranged to be driven by a unit including an electric motor 15 and speed reducing gear 11 operating through a clutchv 15, the speed reducing gear being clamped by bolts I9 to a bracket 83 extending rearwardly from the base part 13 and supported by a spacing pillar BI and clamping screw 82 from the bracket 44.

The spindle 'of the pinion is provided with means including a cross pin 18' whereby a driving handle may belinserted through an aperture in the cover part 1I and coupled with the pinion, and the clutch 'I8 is of known type in whichy placing a driving handle in operative position effects movement of a part of the .clutch against a biassing spring to open the clutch.

This construction is illustrated in Figures 2 andZA which show the clutch 18 in the engaged and disengaged positions respectively. When the end II) of the handle is inserted in the .y aperture in cover part 1I, the. end of the handle pushes the slidable clutch part IBI to the left,

modica 51 disengaging clutch. dog |32 from slot |63. G-lutch part II-I is preferably keyed to the electric motor shaft', and a simple ball click arrangement (not shown) locates this clutch member in oneposition or the other, member I6| being manually movable from disengaged to engaged position. The handle is adapted to engage part 18 of the pinion spindle as it moves clutch element IBI to disengaged position.

",Ij'he valve spindles 2; and 5", the levers 39 and' ft2,v the tappets 38 and 4I and the cam shaft 43 are offset from the longitudinal centre line of theforging- I towards the side thereof at which the driving motor 16 is mounted and the motor is spaced from the side of the forging. The motor 1-6, moreover, isl positioned with its shaft well abt'ivev the longitudinal cen-tre line ofV the forging I'. thus spacing the motor from the;` forging I- and.V disposing it remotely from the inlet pipe flange I'Il, danger of overheating the motor when the control apparatus is used in connection with hot steam is reduced r obviated.

Supported by the base part-10 of the casingl enclosing the spur wheel and pinion are three similar stop switches 83, 84 and 85. As shown by Figures and 6, each switch includes a casing 86 from which project lugs 81 formedwith holes 8;.8- ior clamping studs. The base of casing 8;6 is provided with a bore 89 and a packing washer 99 fits around an annular projection 9| and within an annular recessl Slv of the said base. The casing is closed by a cover 93 which screws onto the casing, andl secured by screws (not shown) against an annular shoulder 94 lwithin the casing is a contact mounting plate 35. vDuets. 96 inthe side of the casing permit the passage of electric cable to the switch terminals and the ducts are internally threaded so that one of the ducts may be Closed by a plug,

'I jhe plate 95` isV centrally apertured for the passage of a plunger 9-1- and'v is formed with apertures 98 for the passage of two contact andy terminal rods 99 each o f which is insulated from the plate 95h51 an insulating bush |094 and an insulating washer IUI and is secured in position by a nut |02 screwing onto the rod and clamping'the associated bush and washer between a metalwasher ID3' and a Shoulder |04 formed, 01.1 'the ro'd At its forward end each rod is formed with a'contact |05 and at its rear end with washers |06 and nut |01v for securingan electrical conductcr thereto.

'I he cover 9 3v is formed with a central bore I (it coaxial with the bore 89 and serving asv a guide for the plunger 91. The rear endv of the plunger 91 is covered by an inspection cap-nut IjILJA which may b e rotated relatively to but is retained. by an. erm H0. hinged tQ the. 111s, I I-I on. the cover.` By unscrewingv the clap-nut |99 the positionv and movements ofthe end of the plunger 9 '1 may be. observed'.

k'The p-lunger 91 has a `forward: end, I I2 which slidably fits the bore 89, a( partl |I3- of reduced diameter-- which slidably fits the boren |08` andanV intermediate annular projection IM; The forward endj I-I'IlV projects from the casing 8 5 and formed with a rounded' extremity II5. Mounted f. "insulated from the Dart H3 by means off an insulating, bush. H56- and an. insulating., Washer Iflfl; is afcontact disc. l'ltand: a helical compres.- sionspring IIS, having vits opposite ends seated.` respectively against the. cover 93ianda washer |20,M4 acts on the insulating. bush |I6 through a. collar I2! @Ildwahg 1212; 1.1.1* this. Wax 1318.00.11- tact'disc H8 is biassed-y to the closed position in which it bridges.the xed contacts I|l5A and, since the insulating bush I|6 and insulating washer II1 are arranged to engage the annular projection II4 the spring also. serves to positionthe plungeri-n a normal position shown in the draw ings.v Whilst'the plunger is able to move outwardly beyond the normal position to a small degree, such outward movement is limited byengagement of the annular-projection II-4 with the base of the casing. l

By pressing; upon the rounded extremity II5y the plunger 91 may be pressed inwardly to move the contact disc II8 away from the fixed contacts |05.

At each ci the locations wherea switch 83, 84' orV 85 is fitted, the base part 10 or the casingenclosing the spur wheel is formed with an aperture into which fits the annular projection 9|' of the switch casing and with studs |23 for passing through the holes 88 in the lugs 81 and cooperating with associated clampingnuts.

The stop switches 83, 84 and 85 are positioned with the longitudinal axes of their plungers 9-1 on a circle having its centre on the longitudinal axis ofthe cam shaft 43, and secured to the outer part |24 of the spur wheel 46 so as to lie on the same circle is a cam or pusher |125', shown in detail in Figures 1A and 1B. suitablythe pusher` |25 is clamped in position by a stud pr-ojecting` therefrom, passing through the part |24 and cooperating with nuts I26-. Rotation of-the pusherrelatively to the spur wheel is prevented'since the radially outer face of the pusher conforms to and engages part of` the radially inner race of: the annular shoulder |I21 of; the. spur wheel, The pusher is formed with a cam face adapted by engaging the rounded end I I5 of the plunger 9-1 ofthe stop switch 83, 84 or 85 to press the plunger'v inwardly against the bias of the spring |I-9 and thereby open the switch.

The main and by-pass valves are adapted to be opened and closed in desiredsequence by unidirectional rotation ofthemotor 'Hi'orr ofl the hand-1e coupled to the spindle of the pinion, and' the cams are designed to provide lost motion whereby the rotor of the motor hasy freedom` ofi movement within-limits while the valves are in their closed: positions. ActuallyV eachA cam is off horseshoeshape as shown in Figure 3 so that when the cooperating tappet is-in a position corresponding to the open or the closed position cfthe associated valve, the cam shaft may be rotated forwardly through a` substantial angle with-A out aiecting the position of the tappet, since the shoe.

In Figures 7; '1A and 7B the cam 31 and the cam 49 are shown in their start and stop positions in which the lines O-I ofy Figures.l 'Manci 7B', assumedl xed relatively to the cams, cut the axes ofthe tappet rollers 64 and' 5 3 shown in the positions occupiedv when the main and by-pass Valves are closed. The stop switches 8 3, 84 andV are diagranimatically illustrated yin Figure '1VA and it willk be observed' that the switch 8 4 is displaced from the switch 83 inY a clock-wise directionthrough an angle ofg905 and'that the switch 85i's displaced from the switch 84 in a clockwise direction` through an angle ofY 1509.-. When the cams 31 and 4I) Vare* in their-start and; stop positions the pusher |25 is opposite the stcp switch- 83A so that the contacts of that switch are open. The parts ofthe carnsbelow the tappetrollers` whenfthe camshaverotated ina clockwise direction-fte theirby-pass openpositionsare shown by the lines O--II of Figures 7A and 7Bandthe parts of the cams below the tappet rollers whenfthe cams have rotated in a clockwise direction to their mainvalve open positions are shown by the lines G-III of Figures 7A and .'lB. Thev lines O-II are displaced by angles of 90 from the lines -I and the lines O-III are displaced by angles of 150 from therlines (lv-VII. a ,I Y

It will be seen that when the cams-31 andv dll are in their start and stop positions they are out of contact with the tappet rollers 53 and 64 respectively. In operation, when the cam shaft 43.

is rotated, the pusher |25 moves away from the stop switch 83 and the contacts of the latter close. Also the cam dal engages the tappet roller G4 and acts to move the by-pass valve towards its open position until, in the by-pass valve open positions of the cams, the line O-II cuts the axis of the tappet roller 5A, when the by-pass valve isY fully open and the pusher |25 opens the con-` tappet roller 53 and acts to move the main valve towards its open position until, in the main valve open position of the cam, the line O-III cuts the axis of the tappet roller 53, when the main valve is fully open and the pusher |25 opens the contacts of the stop switch 85. The opening of the switch contacts may be utilized in suitable manner to stop the electric motor. The cam 50 is so shaped that during the latter part of the movement from the by-pass valve open position to the main valve open position the by-pass valve recloses. Y

When the rotation of the cam shaft is `restarted, the pusher |25 moves away from the` stop switch 85 so that the contacts of that switch;

reclose, and movement of the cam 31 permits the tappet roller 53 to move towards the valve closedk position until the main valve has reclosed. When the cams reach their start and stop positions in which the lines O-I cut the axes of the tappet rollers, the pusher |25 eifects reopening of the contacts of the stop switch 83 and the reopening of the switch contacts may be utilized in suitable manner to stop the electric motor.

It will be appreciated that the opening of thev tappet roller 64 and commences to exert a thrust thereon. The profile of the cam 55 is such that by the by-pass valve is maintained fully open until the cam shaft has rotated through nearly 100 from the by-pass valve open position and the cam 31engages the tappet roller 53 only whenV the cam shaft has Vrotated. about 25 from the by-pass valve open position, so that after the cam shaft has reached the by-pass valve Open` position the motor is able to rotate to a considerable degree without affecting the position either of the valve spindle 5 or the valve spindle 2. Such latitude also enables the driving motor to run up to speed before commencing to open the main valve when the cam shaft is rotated from the by-pass Valve open position. The profile of the cam 31 is such that it Vmay be moved forwardly from the main valve closed position through a substantial angleV without accompanying movement or appreciable movement of the valve spindle 2 and, since the by-pass valve has already closed, the motor is again able to rotate to a substantial extent after, having driven the cam shaft to the main valve vopen position without aifecting the position of the valve spindleA and without affecting orappreciably affecting the position of the valve spindle 2. When the cam shaft reaches the start and stop position and the motor is de-energized, the motor is able to rotate to a considerable degree without absorbing the whole of the last motion provided between the cam 40 and the tappet roller 64, so that when the motor is restarted it is able to run up to speedbefore commencing to reopen the by-pass valve.

It will be seen, therefore, that we have provided in the driving gear for actuating the movable elements Vof the main and by-pass valves lost motion means adaptedto provide within limits freedom of movement of the movable part ofthe motor relatively to the movable parts of the valves while the latter are in their closed positions and that We have also provided means for enabling movements within substantial limits of the movable part of the motor to take place while the valves remain in or substantially in their open positions. y

Since the sequential operation of the valves is achieved by unidirectional rotation of the cam shaft, reversal of the motor is unnecessary and control thereof is facilitated. Remote control may be carried out in a simple fashion by utilizing the stop switches to stop the motor when the E am shaft reaches the Yappropriate angular posiion.

In Figure 8 the electric motor 16 may be connected to the three phase power supply |28 through a contactor |29, the coils |30 of an overload relay and the fuses |3|. is provided with a closing coil |32 and the overlload relay includes a normally closed contact A controller |34 is provided with a rotary element including segments |35, |35, |31 and |38, the segment |35 bridging associated contacts when, as shown, the rotary element is in the off positionrthe segments |35 and |31 respectively bridging associated contacts when the rotary element is in the open position; and the segment |38 bridging associated contacts when the rotary element is in the close position.

In addition, there are provided four relays, a relay including a coil |39 and normally open contacts ISG and |4|; a relay including a coil |42 and normally open contacts |43 and |44; a relay including a coil |45, normally open contacts |45 and |61 and normally closed contact |48; and a relay including a coil |49 and normally open contacts |50 and |5|, of which the contact |55 operates without a time delay and the contact |5| is adapted, in known manner, to close with a suitable time delay. The time delay can be effected for example by a self-starting electric clock mechanism'which is part of the time delay switch.k Such mechanisms are well known and commercially available.

The :cam shaft is assumed to be in the start The contactar current ows between the bus-bars through segment |35,relay coil |39 and overload relay contact 33, so that the contacts |40 and 4| close.

'Ihe contact |40 makes a maintaining circuit for the coil |39 to keep the coil energized when the rotary element is moved from the "off position.

When the rotary element of the controller is moved to the open position, current ows between the bus-bars |54 and |55 through the stop switches 94 and 85, segment |31, relay contact |48, relay coil |42 and relay contact |4|, with the result that the relay contacts |43 and |44 close.

Upon closure of the relay contact |43, current flows between the bus-bars |52 and |53 through that contact and the contactor coil |32. The contactor |29 therefore closes, the motor 16 commences to drive the cam shaft 43 and when the cam shaft has rotated through a small angle the stop switch 83 closes.

Upon closure of the relay contact |44, current flows between the bus-bars |52 and |53 through the coil |49, segment |36 and contact |44. The time delay contact therefore commences to close and the contact |50 closes and makes a maintaining circuit for the coil |49 in parallel with the contact |44.

When the cam shaft 43 reaches the by-pass valve open position the pusher |25 opens the switch 04, with the result that the relay coil |42 is deenergized, the relay contacts |43 and |44 reopen, the contactor coil |32 is deenergized, the contactor 29 opens and the motor 16 stops.

Upon completion of the predetermined time delay, the relay contact |5| closes so that current ows between the bus-bars |54 and |55 through the contact |5|, stop switch 85, segment |31, relay contact |48, coil |42 and relay contact |4|, with the result that the relay contacts |43 and |44 are again closed, the contactor coil |32 is energized and the contactor |29 recloses. The motor 16 therefore drives the cam shaft 43 and after rotating through a small angle the pusher |25 permits the stop switch 84 to reclose. The rotation is continued until the cam shaft reaches the main valve open position, whereupon the pusher opens the stop switch 85, with the result that the relay coil |42 is deenergized, the relay contacts |43 and |44 open, the contactor coil 32 is deenergized, the contactor |29 opens and the motor 16 stops.

The rotary element of the controller may now be moved to the off position, with the result that the relay coil |49 is deenergized and the relay contacts |50 and |5| open.

When the rmain valve is to be closed, the rotary element of the controller is moved to the close position, when current ows between the bus-bars |54 and |55 through stop switch |83, segment |38, relay coil |45 and relay contact |4 with the result that relay contact |48 opens and relay contacts |48 and |41 close. Closure of' the relay contact |41 serves to maintain the circuit of the relay coil |45 in the event of the rotary element of the controller being moved l0 from the close position; opening of the relay contact |48 prevents energization of the relay coil |49 in the event of the rotary elementA of the controller being turned to the open position; and closure of the relay Contact |46 effects energization of the contactor coil |32 so Vthat the contactor |29 closes and the motor drives the cam shaft 43. When the cam shaft has rotated f through a small angle from the main valve open position the stop switch 84 closes and when the cam shaft reaches the start and stopposition the pusher |25 opens the stop switch 83,'with the result that the relay coil |45 is deenergized, the relay contact |48 closes, the relay contacts A|46 and |41 open, the contactor coil 32 is deenergized, the contactor |29 opensand the motor 16 stops. y

If duringoperation of the motor the overload relay contact |33 opens, the relay coil |39 is` deenergized and the contacts |40 and l`|4|' open. Then the rotary element of the controller must be moved to the olf position in order to energize the relay coil |39 through the segment |35 and overload relay contact |33 before the motor 16 can be reenergized.

The apparatus described above may be used in conjunction with a number of uid heater cleaners adapted to be automatically controlled and operated in sequence for the purpose of cleaning the fluid heating surfaces of a steam generating installation, the apparatus being utilized to control the ilow of steam for heating piping leading to the fluid heater cleaners, in order to avoid excessive condensation in the piping at the commencement of the blowing operation, and subsequently to control the fiow of steam to the fluid heater cleaners during the blowing operation.

When the apparatus is used in the manner indicated, a stop valve is opened to allow the escape of condensate and steam from the piping to be heated and the rotary element of the controller is moved to the open position so that the motor 16 drives the cam shaft 43 until the by-pass valve is opened when the motor is automatically stopped. Upon opening of the bypass valve, steam flows therethrough in limited amount suicient to effect the required heating of the piping.

The time delay with which the relay contact 5| operates is adapted to ensure that the piping is sufficiently heated before the main valve is opened. Upon closure of contact 5| the motor is restarted and operates until the main valve is open when the motor is automatically stopped.

At the termination of the blowing operation the rotary element of the controller is turned to the close position, and the motor is restarted and runs until it is automatically stopped with the cam shaft in the start and stop position.

We claim:

1. In a multiple valve construction adapted to be power operated to control the flow of steam or the like, a valve casing having a chamber therein and having inlet and outlet openings communicating with said chamber and arranged at right angles to one. another with the axes of said openings in a common plane, valving means for controlling the flow of fluid from the inlet opening to the outlet opening through said chamber including a plurality of Valves movable in lines lying in a plane parallel to but laterally offset from the common plane of the axes of said inlet and outlet openings, whereby said valves may be disposed closer to one side of said casing than'the other, and actuating means for said valves including a driving member supported by *said casing and extending beside said closer side of the casing. Y

- f 2.l Means as set'forth in claim 1 including a y shaft carried by said casing and projecting there- `from`in a line Within the plane containing the lines of movement of the valves, said actuating means including mechanical transmission means operativelyconnected to said driving member and said valvesand common supporting means carried by said casing and supporting said shaft,

transmission means and driving member.

ROY JABES GLINN.

PERCY GILBERT HANDOLL.

'me of this patent: f

Number Number 12 UNITED STATES PATENTS Name Date Meady June 20, 1893 Leach Aug. 1, 1911 Street June 1, 1915 Paske Mar. 22, 1921 Magazzini Oct. 23, 1928 Bridgens Aug. 27, 1929 Fawcett Apr.22, 1930 Wilson Dec. 9, 1930 Ray Feb. 3, 1931 Robinson May 9, 1933 Armstrong May 28, 1935 Koller Sept. 29, 1942 Blauvelt May 8, 1945 FOREIGN PATENTS Country Date Denmark June 1l, 1917 Great Britain Mar. 29, 1934 

